Your Twitter engagement rate indicates how much people like your content.
Dasheroo calculates engagement rate as follows:
Engagement Rate = (RTs + Replies + Favorites) / Total Followers
For example, if you had 28 replies, retweets & favorites, and 1,487 followers your engagement rate would be 1.88%
Why is this different that what I see in twitter?
Twitter calculates engagement rate differently.
Engagement rate: Number of engagements divided by impressions
Unfortunately, Twitter does not offer access to impressions data via the Twitter API; until they do we will continue to use our own calculation.